US 2020/0270435 A1 · METHOD FOR MAKING HETEROPHASIC POLYMER COMPOSITIONS

Abstract

A heterophasic polymer composition comprises a propylene polymer phase, an ethylene polymer phase, a compatibilizing agent comprising a fulvene moiety, and a nucleating agent. A method for modifying a heterophasic polymer composition comprises the steps of providing a compatibilizing agent, providing a nucleating agent, providing a heterophasic polymer composition comprising a propylene polymer phase and an ethylene polymer phase, mixing the compatibilizing agent, the nucleating agent, and the heterophasic polymer composition, and generating free radicals in the propylene phase and the ethylene phase. At least a portion of the compatibilizing agent then reacts with free radicals in both the propylene polymer phase and the ethylene polymer phase to form a bond with a propylene polymer in the propylene polymer phase and a bond with an ethylene polymer in the ethylene polymer phase.

Claims20

Dependent claims

A heterophasic polymer composition comprising:

(a) a propylene polymer phase comprising propylene polymers selected from the group consisting of polypropylene homopolymers and copolymers of propylene and up to 50 wt. % of one or more comonomers selected from the group consisting of ethylene and C4-C10 α-olefin monomers;
(b) an ethylene polymer phase comprising ethylene polymers selected from the group consisting of ethylene homopolymers and copolymers of ethylene and one or more C3-C10 α-olefin monomers;
(c) a compatibilizing agent comprising a fulvene moiety;
and
(d) a nucleating agent.

2 more elements

A method for modifying a heterophasic polymer composition, the method comprising the steps of:

(a) providing a compatibilizing agent, the compatibilizing agent comprising a fulvene moiety;
(b) providing a nucleating agent;
(c) providing a heterophasic polymer composition, the heterophasic polymer composition comprising a propylene polymer phase and an ethylene polymer phase;
(d) mixing the compatibilizing agent, the nucleating agent, and the heterophasic polymer composition;
and
(e) generating free radicals in the propylene polymer phase and the ethylene polymer phase, whereby at least a portion of the compatibilizing agent reacts with free radicals in both the propylene polymer phase and the ethylene polymer phase to form a bond with a propylene polymer in the propylene polymer phase and a bond with an ethylene polymer in the ethylene polymer phase.

3 more elements

Dependencies are inferred from the claim text.

Method for making heterophasic polymer compositions

Life of this patent

Method for making heterophasic polymer compositions

Life of this patent

Abstract

Claims20